points_harris — Detect points of interest using the Harris operator.
points_harris ：通过Harris运算检测感兴趣的点。
points_harris(Image : : SigmaGrad, SigmaSmooth, Alpha, Threshold : Row, Column)
points_harris extracts points of interest from an image. The Harris operator is based upon the smoothed matrix
where 
stands for a Gaussian smoothing of size SigmaSmooth and 
and 
are the first derivatives of each image channel, computed with Gaussian derivatives of size SigmaGrad. The resulting points are the positive local extrema of
points_harris 提取一张图片中感兴趣的点。这个Harris 操作基于上面的平滑矩阵来是实现的。表示一个尺寸为SigmaSmooth的高斯平滑掩膜。和是使用尺寸为SigmaGrad的高斯一阶倒数掩膜计算的值。结果点是
计算结果的局部正极值点。
If necessary, they can be restricted to points with a minimum filter response of Threshold. The coordinates of the points are calculated with subpixel accuracy.
如果有必要，可以通过一个最小值Threshold过滤运算结果。结果坐标用亚像素精度进行计算。
标签：SigmaGrad,SigmaSmooth,harris,Harris,算子,Threshold,points From： https://www.cnblogs.com/DropInTheSea/p/16712108.html